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Mathematics, 21.08.2021 01:00 xxcecccc

. Factor each trinomial completely. (4 points: 2 points each) 2x^2 + 17x + 21
3x^2-17x+10
x^2-81
4x^2-25b^2
show your work I genuinly want to learn i just haven't been able to understand online

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